installing error when installing

Hi all,

I’ve been looking at this for hrs and been reading/trying everything I can think of to work around. I have used wordpress before (for this site and this host with no probs and other sites/hosts too with no probs).

I keep getting a 500 error. I’m looking to install into nosquares.com.au/blog

I have deleted, re-installed and changed my MYSQL database and updated the config file with that. Done the same with all wordpress files and checked/updated all details to make sure correct. Changes permissions to my .htaccess file.

I have spoken to my host and they said it was an install prob, so I deleted all wp files from the server and checked everything locally then put the wp files up again.

I’ve checked the error log and it comes up with this:

[Wed Aug 17 16:51:28 2011] [error] [client xxxx] File does not exist: /home/nos47010/public_html/500.shtml
[Wed Aug 17 16:51:28 2011] [error] [client xxxx] SoftException in Application.cpp:601: Directory “/home/nos47010/public_html” is writeable by group

Can anyone help me with this?